Complexes with Sn

Contemporary Boron Chemistry, ed. M. G. Davidson, A. K. Hughes, T. B. Marder and K. Wade, Royal Society of Chemistry, Cambridge, 2000. 

Ormsby, J. D. Kennedy, R. Greatrex and B. Stibr, Inorg. Chem. 

Rosair, S. Robertson and A. J. Welch, Acta Crystallogr., Sect. C Cry St. Struct. Commun., 2000, 56,1399. 

Lamrani, R. Hamasaki, M. Mitsuishi, T. Miyashita and Y. Yamamoto, Chem. Commun.,2000, 1595. 

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Kitamura, C. Maeda, N. Kamada, N. Ouchi, M. Yoneda, A. Synthesis of 2-(substituted methyl) quinolin-8-ols and their complexation with Sn(II)./. Chem. Soc. Perkin Trans. 1 2000, 781-785. 

Several bivalent tin compounds have appreciable water solubilities, e.g. the solubility of tin(II) chloride is 83.9 g in 100 mL at 0°C, that of tin(II) fluoride is 4.1g in 100 mL at 25 °C, and of tin(II) sulfate is 35.2 g in 100 mL at 10 °C. Aqueous solutions are susceptible to hydrolysis to hydrous tm(ll) oxide and oxidation to Sfr species the stability of aqueous solutions depends upon the anions present and the pH. The presence of anions that are able to form strong complexes with Sn , e.g. F or OAc , enhances resistance to hydrolysis and oxidation. Ease of hydrolysis increases with pH at very high pH, disproportionation of Sn to Sn° and Sn results. 

The scope for Sn—B bond formation is narrower than for Si ( 5.7.3.2) and Ge ( 5.3.12.3)T The reactions are complex, with Sn metal and free carborane accompanying the stannaborane as products, the latter thus being obtained in poor yield (Table 1). 

The calculation of the distribution of complexes in the solution containing pyrophosphate and glycine showed that [Sn(P207)2l is dominant complex with Sn at pH 8.0, while two complexes of Ni dominate at a given pH [Ni(P207)2] and [Ni(NH2CH2COO)3]. This is shown in Fig. 7.3. 

Tin(ll) chloride, SnCl2, stannous chloride. M.p. 247 - C. While solid (Sn plus gaseous HCl), forms hydrates (SnCl2,2H20 is tin salt) from Sn and aqueous HCl. Acts as acceptor in complexes and forms complexes with transition metals. Used as a mordant. 

A variety of routes is available for the preparation of metal-thionitrosyl complexes. The most common of these are (a) reaction of nitride complexes with a sulfur source, e.g., elemental sulfur, propylene sulfide or sulfur halides, (b) reaction of (NSC1)3 with transition-metal complexes, and (c) reaction of [SN]" salts with transition-metal complexes. An example of each of these approaches is given in Eq. 7.1,... 

Germanium and Sn are non-toxic (like C and Si). Lead is now recognized as a heavy-metal poison it acts by complexing with oxo-groups... 

The FT-IR spectroscopic measurements shown that in most cases the -COO or -0 groups formed a bridge between two Sn central atom, and polymerization occurred. The pqs approximations proved the formation of complexes with Oh, Tbp, and structures. H NMR measurements performed in DMSO solution have shown that the polymeric structure of the complexes does not persist in solution, and depolymerization occurs.. ... 

The structure and dynamics for some representatives of the series of [Me2Sn(IV)] , [MeSn(IV)] , and inorganic Sn(IV) complexes with (S, Nj-contain-ing donors have been determined by Sn Mossbauer spectroscopy and are reported in Ref. (292). 

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